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Easy Sausage and Egg Croissant Casserole Overnight Recipe for Perfect Breakfast

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A hearty and comforting breakfast casserole made with croissants, sausage, eggs, and cheese that soaks overnight for a perfect, stress-free morning meal.

Ingredients

Scale
  • 6 large croissants, day-old or fresh
  • 1 pound breakfast sausage (Italian or breakfast-style), casing removed
  • 8 large eggs, room temperature
  • 2 cups whole milk (480ml), or half-and-half for extra richness
  • 2 cups shredded cheese (cheddar or a blend of cheddar and mozzarella)
  • 1 small yellow onion, finely chopped
  • 1 clove garlic, minced
  • Salt and freshly ground black pepper, to taste
  • 1 teaspoon Dijon mustard (optional)
  • Fresh herbs like parsley or chives for garnish (optional)

Instructions

  1. Preheat oven to 350°F (175°C).
  2. In a skillet over medium heat, crumble and cook sausage until browned and fully cooked, about 7-10 minutes. Drain excess fat and set aside.
  3. In the same skillet, sauté chopped onion and minced garlic until softened and fragrant, about 3-4 minutes. Combine with cooked sausage.
  4. Slice croissants into roughly 1-inch pieces and place evenly in a greased 9×13 inch casserole dish.
  5. Spread the sausage, onion, and garlic mixture evenly over the croissant pieces.
  6. Sprinkle shredded cheese evenly on top.
  7. In a large bowl, whisk together eggs, milk, Dijon mustard (if using), salt, and pepper until smooth.
  8. Pour the egg mixture evenly over the casserole layers, pressing gently to help croissants soak up the liquid.
  9. Cover tightly with aluminum foil or plastic wrap and refrigerate for at least 6 hours or overnight.
  10. Remove casserole from fridge and let sit at room temperature for 15 minutes.
  11. Bake uncovered at 350°F (175°C) for 45-50 minutes, until top is golden brown and a knife inserted comes out clean.
  12. Let cool for 5-10 minutes before slicing. Garnish with fresh herbs if desired.

Notes

Letting the casserole soak overnight allows croissants to absorb the custard fully, resulting in a custardy center without sogginess. Use room temperature eggs and milk for best texture. If the top browns too quickly, cover loosely with foil to prevent burning. Variations include vegetarian sausage substitutes, gluten-free bread, and adding vegetables like spinach or bell peppers.

Nutrition

Keywords: sausage, egg, croissant, casserole, breakfast, brunch, overnight, easy, savory

Find it online: https://magnetmeal.com/easy-sausage-and-egg-croissant-casserole-overnight-recipe-for-perfect-breakfast/